Cisco 7975G Troubleshooting And Maintenance

We recommend that you provide the phone with an Alternate TFTP server setting manually. This setting
allows the phone to download the configuration and other files from TFTP. The phone in a remote location
(home office) cannot correctly provide OPTION 150 to the phone using DHCP.
The IP phone can register to the last-known Cisco Unified Communications Manager, but any configuration
updates cannot applied until you configure the manual TFTP server address.
Procedure
Step 1 On the phone, select Applications.
Step 2 Navigate to the IPv4 Settings window.
Step 3 Scroll to the Alternate TFTP option and set the field to Yes.
Step 4 In the TFTP Server 1 field, set the TFTP server address.
Step 5 Save the changes.
Check TFTP Settings
Procedure
Step 1 You can determine the IP address of the TFTP server used by the phone by pressing the Settings button on
the phone, choosing Network Configuration > IPv4, and scrolling to the TFTP Server 1 option.
Step 2 If you have assigned a static IP address to the phone, you must manually enter a setting for the TFTP Server
1 option. See Network Configuration Menu.
Step 3 If you are using DHCP, the phone obtains the address for the TFTP server from the DHCP server. Check the
IP address configured in Option 150.
Step 4 You can also enable the phone to use an alternate TFTP server. Such a setting is particularly useful if the
phone was recently moved from one location to another. See Network Configuration Menu for instructions.
Check DHCP settings
Procedure
Step 1 On the Cisco Unified IP Phone, press the Settings button, choose Network Configuration, and look at the
following options:
• DHCP Server: If you have assigned a static IP address to the phone, you do not need to enter a value for
the DHCP Server option. However, if you are using a DHCP server, this option must have a value. If it
does not, check your IP routing and VLAN configuration. See Troubleshooting Switch Port Problems
at this URL: http://www.cisco.com/en/US/products/hw/switches/ps708/prod_tech_notes_list.html
• IP Address, Subnet Mask, Default Router: If you have assigned a static IP address to the phone, you
must manually enter settings for these options. See Network Configuration Menu for instructions.
Troubleshooting and Maintenance
13
Troubleshooting and Maintenance
Check TFTP Settings

Cisco 7975G Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Grey, Silver
Speakerphone	Yes
Voice codecs	G.711Mu, G.711a, G.722, G.729A, iLBC
Number of melodies	24
Aspect ratio	4:3
Display diagonal	5.6 \
Display resolution	320 x 240 pixels
Lines quantity	8 lines
Phonebook capacity	- entries
Number of VoIP accounts	-
Front camera	No
Security algorithms	128-bit AES
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	DHCP, TFTP
Volume control	Digital
Headphone outputs	1
Ethernet LAN (RJ-45) ports	2
Number of handles included	1 pc(s)
AC adapter output voltage	48 V
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Certification	FCC

Weight and Dimensions

Depth	152.4 mm
Width	266.7 mm
Height	203.2 mm
Weight	1600 g